The Ten Heavenly Stems in BaZi
Category:
Bazi
The Ten Heavenly Stems in BaZi
A simple guide for those who are just starting out
If you imagine BaZi (八字) as a language, then the ten Heavenly Stems are its alphabet. Without understanding the letters, it is impossible to read a word. It is with the stems that an acquaintance with this ancient Chinese system of self-knowledge begins, and the good news is that there are only ten of them, while the logic behind them is remarkably coherent.
What BaZi is and how the stems fit in
BaZi literally means "eight characters". It is a system in which the moment of a person's birth is recorded through the Chinese calendar as four pillars — year, month, day and hour. Each pillar consists of two parts: an upper one — a Heavenly Stem (天干, tiāngān) — and a lower one — an Earthly Branch (地支, dìzhī). Four pillars × two characters = eight characters. Hence the name.
The Heavenly Stems describe what is "on the surface": character, visible energy, the way a person manifests in the world. There are ten of them in all, and they repeat cyclically. In this article we will focus on them — on what each one means and what kind of personality it symbolizes.
The logic of the ten: five elements × two polarities
Where does the number ten come from? It all rests on two ideas familiar to anyone who has heard of Chinese philosophy.
The first is the five elements (五行): Wood, Fire, Earth, Metal and Water. These are five types of energy from which, by tradition, everything around us is composed.
The second is the polarity of yin and yang (陰陽). Each element exists in two versions: an active, overt one (yang) and a soft, hidden one (yin). Five elements multiplied by two polarities give the ten Heavenly Stems. That is the whole arithmetic.
To picture the difference between the yang and yin versions of one element, recall Fire. Yang Fire is the sun: large, open, warming everyone. Yin Fire is a candle: a small, warm, pinpoint flame. The element is the same, but the "character" is entirely different. All five pairs are arranged the same way.
| No. | Character | Name | Element and polarity | Classic image |
|---|---|---|---|---|
| 1 | 甲 | Jiǎ | Yang Wood | a great tree |
| 2 | 乙 | Yǐ | Yin Wood | grass, vines, flowers |
| 3 | 丙 | Bǐng | Yang Fire | the sun |
| 4 | 丁 | Dīng | Yin Fire | a candle, a lamp |
| 5 | 戊 | Wù | Yang Earth | a mountain, a dam |
| 6 | 己 | Jǐ | Yin Earth | fertile soil |
| 7 | 庚 | Gēng | Yang Metal | ore, an axe, a sword |
| 8 | 辛 | Xīn | Yin Metal | a jewel, an ornament |
| 9 | 壬 | Rén | Yang Water | the ocean, a great river |
| 10 | 癸 | Guǐ | Yin Water | rain, dew, mist |
Now let us go through each stem one by one. The easiest way to remember them is through images: tradition describes each character through a natural phenomenon, and a person's character is "read off" from how that phenomenon behaves.
Picture a mighty pine or oak reaching toward the sky. Jiǎ is about uprightness, principle and clear goals. Such a person usually has an inner core, moral bearings and a natural drive to grow and to lead.
Strengths: responsibility, persistence, nobility. What to watch for: stubbornness and inflexibility — a great tree will sooner break than bend.
If Jiǎ is a tree, then Yǐ is grass, flowers and a grapevine. Where a great tree breaks under the wind, the vine bends and survives. Yǐ is a flexible, diplomatic, resilient type who can adapt to almost any conditions and find support.
Strengths: adaptability, tact, endurance. What to watch for: dependence on support or on other people, and a hidden but firm stubbornness.
Bǐng is the sun: bright, generous, open. It shines on everyone equally and cannot hide itself. Such people are often charismatic, optimistic and energetic; they easily ignite others and dislike half-tones.
Strengths: charisma, enthusiasm, sincerity. What to watch for: a fiery temper, impatience and a need to be the center of attention.
Dīng is the flame of a candle, a lamp, or starlight at night. It does not blind; it warms those nearby and shines steadily and precisely. Dīng is a warm, attentive, perceptive type with a fine intuition and an ability to notice details that others miss.
Strengths: sensitivity, intuition, devotion. What to watch for: vulnerability and mood swings — a candle's flame trembles with every draft.
Wù is a mountain, a dam, a great wall. Immovable, dependable, calm. Such people become a support for others: you can rely on them, they withstand pressure and do not panic in a crisis. This is the embodiment of stability.
Strengths: steadiness, reliability, composure. What to watch for: slowness, conservatism and that same mountainous stubbornness.
Jǐ is soft, fertile soil, garden earth, a field. Its task is to nourish and to grow things. Jǐ is a caring, modest, practical type who works unnoticed, yet it is thanks to them that something "sprouts". More flexible and closer to people than the immovable mountain of Wù.
Strengths: care, flexibility, tolerance. What to watch for: insecurity and a tendency to take on other people's problems.
Rén is the ocean, a great river, a waterfall. A vast, mobile, free element that always flows forward and finds its way around obstacles. Such people have a broad outlook, a sharp mind and a love of freedom; they are hard to "keep within their banks".
Strengths: intellect, adaptability, a generosity of ideas. What to watch for: inconstancy and a tendency to spread themselves thin.
Guǐ is rain, dew, mist and springs. Quiet water that seeps in everywhere and nourishes unnoticed. Such people are sensitive, perceptive, dreamy, with a rich imagination and strong intuition. They act gently, yet they are able to "seep" into places that force cannot break through.
Strengths: intuition, delicacy, depth. What to watch for: excessive sensitivity, anxiety and a habit of hiding their true thoughts.
The "Day Master" — the most important stem in the chart
All ten stems matter, but one of the four in the chart is special. The Heavenly Stem of the day pillar is called the Day Master (日主 or 日元). It is the one that symbolizes you — the core of your personality. The remaining stems and branches describe your surroundings: resources, talents, relationships, opportunities and challenges.
So when people say "I am Yang Wood" or "I am Yin Water", they mean precisely their Day Master. This is the first thing determined in any BaZi chart, and the starting point for all further analysis.
How the stems "communicate" with one another
A single stem is only a stroke. Meaning is born from how they interact. To begin with, it is enough to know about two things.
The first is the cycles of the five elements. The elements generate one another (Water feeds Wood, Wood feeds Fire, Fire gives Earth, Earth gives birth to Metal, Metal gathers Water) and control one another (Water puts out Fire, Fire melts Metal, and so on). So two stems in a chart can strengthen, weaken or balance each other.
The second is the five stem combinations (天干五合): Jiǎ+Jǐ, Yǐ+Gēng, Bǐng+Xīn, Dīng+Rén, Wù+Guǐ. These are special pairs that attract one another like magnets. For a beginner it is enough simply to know that such connections exist — they are examined in more depth at later stages.
Summary
The ten Heavenly Stems are the five elements in two polarities, each with its own character, image and "temperament". Jiǎ and Yǐ are Wood, Bǐng and Dīng are Fire, Wù and Jǐ are Earth, Gēng and Xīn are Metal, Rén and Guǐ are Water. Knowing them, you are already able to read the Day Master in any chart and understand the basic disposition of a person.
This is only the first step, but it is exactly the one that opens the door into BaZi. Next will come the Earthly Branches, the interactions of the pillars, the luck cycles by decade — yet all of this rests on the same alphabet of ten characters with which we began.
04 Oct 2026
Author:
Rostyslav Voitovych
